CompNtwk : Lab 3.3.2 Determining the Router Hardware Options

Task 1: Inspect a Cisco 1841 ISR

Step 1: Physically inspect the external features of the router

Examine the router. In the table below, identify and match each item number in the figure with the description. In addition, record the number of each interface and port on the router with the description.

Is a module installed in Slot 0? No

How many Fast Ethernet interfaces does the router have?

2

WIC-2T two serial interfaces

Is a module installed in Slot 1?

No

Which of the modules and ports have the potential to be upgraded to improve the router’s

capabilities?

Slot 0 dan Slot 1, flash card slot

 

Step 2: Use IOS show commands to inspect the router

a. Referring to the topology diagram, connect the console (or rollover) cable to the console port on the

router and the other cable end to the host computer with a DB-9 or DB-25 adapter to the COM 1 port.

Ensure that power has been applied to both the host computer and router.

b. Establish a HyperTerminal or other terminal emulation program connection to the router.

c. From the privileged EXEC mode prompt of the terminal, issue show run and show flash:

commands.

Record the number and type of interfaces. Typical results are shown.

interface FastEthernet 0/0

interface FastEthernet 0/1

interface Serial 0/0/0

interface Serial 0/0/1

interface VLAN1

Record the details of the memory (DRAM, flash) modules.

Flash 32 MB

SDRAM 128 MB

Step 3: Compare the physical and IOS inspections

Are there any differences between the physical and IOS inspections?

No

Observed differences could be due to the IOS having features implemented in the software that do not have the hardware module installed, or loopback interfaces may be configured.

If an installed hardware interface does not appear in the configuration, it may be faulty or may not be correctly installed. In some cases, slots must be filled consecutively; in other cases, certain module types can only be installed into specified slots.

Task 2: Examine 1841 Router Hardware Options

After establishing the current hardware status of the router, examine the technical documentation to

determine the potential for upgrading and growth.

Step 1: Access the Cisco.com documentation

a. Go to the website http://www.cisco.com.

b. In the Quick Links pane on the right, select Documentation.

c. Under Select a category, click Routers. Under Select a product, click the Cisco 1800 Series

Integrated Services Routers link.

d. Review the documentation links displayed.

e. Under Product Literature, click the Data Sheets link. Note the range of data sheet documentation

available.

f. Click Cisco 1800 Series Integrated Services Routers: Cisco 1841 Router (Modular).

Step 2: Record the router hardware information

a. Read through the Cisco 1800 Series Integrated Services Routers: Cisco 1841 Router (Modular)

document, noting the structure and format of the information.

b. From Table 1, Architecture Features and Benefits of Cisco 1841 Router, record the following

information:

The number of different modules and interface cards that are supported: >30

Default memory capacity:

32 MB of flash and 128

MB of synchronous dynamic RAM (SDRAM)

Cisco IOS versions supported:

12.3T, 12.4, 12.4T

Feature Sets and Beyond

c. From Table 5, Product Specifications of Cisco 1841 Router, locate and record the following

specifications from the Architecture section.

d. From the Table 6, Modules and Interface Cards the Cisco 1841 Router Supports, list the 10

different categories of interface card (WIC) supported by the 1841 platform.

e. From Table 6, what feature does the Advanced Integration Module (AIM) enable to be installed in an

1841 router?

VPN encryption

Step 3: Consider possible hardware options

The 1841 ISR has removable and interchangeable modules. Various optional modules can be installed in the router to provide specific capabilities. These modules are installed either by inserting them into slots on the chassis, or by opening the chassis and plugging them into connectors inside.Flash memory and interface cards fit into slots on the chassis and are installed and removed without opening the chassis.

There are three types of interface cards for the 1800 series modular routers:

  • • WAN interface cards (WICs)
  • • Voice WAN interface cards (VWICs – in data mode only on the Cisco 1841)
  • • High-speed WAN interface cards (HWICs)

The following components plug into connectors inside the chassis and are installed and removed only by

opening the chassis:

  • • Advanced Integration Module (AIM)
  • • Synchronous dynamic RAM (SDRAM) small-outline dual in-line memory module (SODIMM

Summarize the changes that are possible for this router. This information is important to have and consider when planning and designing the network upgrade.

If the router is not at its limit of these features, candidates for upgrading could include:

Flash memory (if larger IOS required)

SDRAM

Slot 1 Ethernet switch 4-port module

Slot 1 WIC-2T – 2 serial interfaces

Slot 1 Other WAN technology DSL/ISDN

Step 4: Clean up

Erase any configurations and reload the router. Disconnect and store the cabling. For PC hosts that are

normally connected to other networks (such as the school LAN or to the Internet), reconnect the appropriate cabling and restore the TCP/IP settings.

Task 3: Reflection

Network device capabilities are continuously developing. Consider the advantages of a modular platform over that of a device with a fixed hardware platform.

Modularitas memfasilitasi kustomisasi perangkat untuk memenuhi kebutuhan jaringan lokal.
Peningkatan dan penggantian modul mengurangi biaya dan waktu dari layanan.
Perangkat Modular menyediakan desain jaringan yang fleksibel dan scalable.

 

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